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Niger Seed Agar: Introduction, Principle, Composition, Test Procedure, Colony Morphology and Uses
Introduction of Niger Seed Agar BSA stands for Bird Seed Agar which sounds seed of a bird but actually, it is a niger seed, botanical name Guizotia abyssinica. Niger seed contains caffeic acid that serves as a substrate for the detection of phenoloxidase, an enzyme produced by Cryptococcus neoformans. The action of phenoloxidase on caffeic acid results in the production of melanin which is occupied by the yeast cell wall forming brownish-yellow. Bird seed agar is thus also called niger...
ADA Titer: Introduction, Principle, Procedure, Result Interpretation and Keynotes
Introduction of ADA Titer Anti D Antibody short form is ADA and it is also known as Rh typing antibody and its semi-quantitative determination is titer. ADA titer or Rh antibody titer is clinically significant in a pregnant woman who is Rh-negative and her husband Rh-positive. A rising of ADA titer indicates the possible occurrences, of hemolytic disease of the newborn (HDN). Principle of ADA Titer Antibody titration implies a serial dilution of the serum. Each dilution...
Adenosine Deaminase Test : Introduction, Principle, Procedure, Normal Range and Clinical significance
Introduction of Adenosine Deaminase Test The short form of the Adenosine Deaminase Test is the ADA test. It is very useful for suspicious cases of tuberculosis, increased levels of ADA could facilitate diagnosis. ADA is an enzyme that primarily functions in our body in the development and maintenance of the immune system, and its stands for adenosine deaminase. ADA catalyzes the conversion of adenosine and 2’-deoxyadenosine to inosine and 2’-deoxyinosine and is widely distributed in various tissues and...